chore: go mod tidy

This is a more graceful way to disable ENOBUFS reporting than
bed34f94be

go.mod

@@ -16,7 +16,6 @@ require (
 	github.com/stretchr/testify v1.8.4
 	go.uber.org/zap v1.26.0
 	golang.org/x/crypto v0.19.0
-	golang.org/x/sys v0.17.0
 	google.golang.org/protobuf v1.31.0
 	gopkg.in/yaml.v3 v3.0.1
 )
@@ -44,6 +43,7 @@ require (
 	golang.org/x/exp v0.0.0-20230905200255-921286631fa9 // indirect
 	golang.org/x/net v0.19.0 // indirect
 	golang.org/x/sync v0.5.0 // indirect
+	golang.org/x/sys v0.17.0 // indirect
 	golang.org/x/text v0.14.0 // indirect
 	gopkg.in/ini.v1 v1.67.0 // indirect
 )

io/nfqueue.go

@@ -12,7 +12,6 @@ import (
 	"github.com/coreos/go-iptables/iptables"
 	"github.com/florianl/go-nfqueue"
 	"github.com/mdlayher/netlink"
-	"golang.org/x/sys/unix"
 )
 
 const (
@@ -128,6 +127,10 @@ func NewNFQueuePacketIO(config NFQueuePacketIOConfig) (PacketIO, error) {
 	if err != nil {
 		return nil, err
 	}
+	err = n.Con.SetOption(netlink.NoENOBUFS, true)
+	if err != nil {
+		return nil, fmt.Errorf("failed to set NoENOBUFS option: %w", err)
+	}
 	return &nfqueuePacketIO{
 		n:     n,
 		local: config.Local,
@@ -153,12 +156,6 @@ func (n *nfqueuePacketIO) Register(ctx context.Context, cb PacketCallback) error
 			return okBoolToInt(cb(p, nil))
 		},
 		func(e error) int {
-			if opErr := (*netlink.OpError)(nil); errors.As(e, &opErr) {
-				if errors.Is(opErr.Err, unix.ENOBUFS) {
-					// Kernel buffer temporarily full, ignore
-					return 0
-				}
-			}
 			return okBoolToInt(cb(nil, e))
 		})
 	if err != nil {